What is MSTEE?

The genuine MSTEE.sys file is a software component of Microsoft Streaming Tee/Sink-to-Sink Converter by Microsoft.
A video capture filter, this application is provided by Microsoft and works in kernel mode on analog video. Founded in 1975, Microsoft's flagship product is the Windows operating system, which is installed on over 90% of workstations worldwide.

MsTee stands for Microsoft Tee Filter

MSTEE.sys is a Windows driver. A driver is a small software program that allows your computer to communicate with hardware or connected devices. This means that a driver has direct access to the internals of the operating system, hardware etc. The free file information forum can help you determine if MSTEE.sys is a Windows system file or if it belongs to an application that you can trust.

Run a free scan to check for MSTEE drivers in need of updating

MSTEE.sys file information

The process known as WDM Tee/Communication Transform Filter belongs to software Microsoft Streaming Tee/Sink-to-Sink Converter or Microsoft Streaming Tee/Sink-to-Sink-Konvertierung by Microsoft (

Description: The original MSTEE.sys is an important part of Windows and rarely causes problems. MSTEE.sys is located in the C:\Windows\System32\drivers folder. Known file sizes on Windows 10/8/7/XP are 5,504 bytes (66% of all occurrences) or 5,888 bytes. 
The driver can be started or stopped from Services in the Control Panel or by other programs. The MSTEE.sys file is a Windows system file. MSTEE.sys is a Microsoft signed file. The program is not active. The program has no visible window. There is no detailed description of this service. MSTEE.sys appears to be a compressed file. Therefore the technical security rating is 0% dangerous.

Recommended: Identify MSTEE.sys related errors

Important: Some malware disguises itself as MSTEE.sys, particularly when not located in the C:\Windows\System32\drivers folder. Therefore, you should check the MSTEE.sys process on your PC to see if it is a threat. We recommend Security Task Manager for verifying your computer's security. This was one of the Top Download Picks of The Washington Post and PC World.


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Best practices for resolving MSTEE issues

A clean and tidy computer is the key requirement for avoiding problems with MSTEE. This means running a scan for malware, cleaning your hard drive using cleanmgr and sfc /scannow, uninstalling programs that you no longer need, checking for Autostart programs (using msconfig) and enabling Windows' Automatic Update. Always remember to perform periodic backups, or at least to set restore points.

Should you experience an actual problem, try to recall the last thing you did, or the last thing you installed before the problem appeared for the first time. Use the resmon command to identify the processes that are causing your problem. Even for serious problems, rather than reinstalling Windows, you are better off repairing of your installation or, for Windows 8 and later versions, executing the DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.

To help you analyze the MSTEE.sys process on your computer, the following programs have proven to be helpful: Security Task Manager displays all running Windows tasks, including embedded hidden processes, such as keyboard and browser monitoring or Autostart entries. A unique security risk rating indicates the likelihood of the process being potential spyware, malware or a Trojan. Malwarebytes Anti-Malware detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.

Other processes

MSTEE.sys [all]